GMC 1982 Light Duty Truck Service Manual page 386

3D -4 REAR SUSPENSION
Fig. 3D-10--Rear Stabilizer Shaft-C-20(43), C-30
LEAF SPRING ASSEMBLY
Refer to Figs. 3D-12 - 3D-21 for specific leaf spring
mounting provisions of C, K, G and P models. Fig. 3D-22
illustrates a typical U-bolt anchor plate installation with the
mandatory tightening sequence.
NOTICE: See N O T I C E on page 1 of this section,
regarding leaf spring fasteners.
Removal
1. Raise vehicle on hoist so that load in spring is relieved.
2. Loosen, but do not remove, spring-to-shackle retaining
nut.
3. Remove nut and bolt securing shackle to spring hanger.
4. Remove nut and bolt securing spring to front hanger.
5. Remove " U " bolt retaining nuts, withdraw " U " bolts
and spring plate
attachment.
6. W ithdraw spring from vehicle.
7. Inspect spring. Replace bushings, repair or replace
spring unit as outlined in this section.
Bushing Replacement
1. Place spring on press and press out bushing using a
suitable rod, pipe or tool as shown in Fig. 3D-21.
2. Press in new bushing; assure that tool presses on steel
outer shell of bushing.
Rear Spring, Front Eye-Heavy Duty leaf springs on
C20, CK30, and some P30 trucks use a staked- in-place
flanged front eye bushing. Before this bushing is
pressed out of the spring, the staked locations must be
straightened with a chisel or drift. After a new bushing
is installed, it must be staked in three equally spaced
locations.
from spring-to-axle housing
NOTE
unthreaded portion of bolt.
Fig. 3D-11--Rear Stabilizer Shaft-P30
Spring Leaf Replacement
1. Place spring assembly in a bench mounted vise and
remove spring clips or pry clips open.
2. Position spring in vise jaws, compressing leaves at
center and adjacent to center bolt.
3. File peened end of center bolt and remove nut. Open
vise slowly to allow spring assembly to expand.
4. Wire brush and clean spring leaves. Inspect spring
leaves to determine if replacement is required; also
replace defective spring leaf liners at this time.
5. Align center holes in spring leaves by means of a long
drift and compress spring leaves in a vise.
6. Remove drift from center hole and install a new center
bolt. Tighten nut and peen bolt to retain nut.
7. Align spring leaves by tapping with hammer, then
reinstall alignment clips. Spring clips should be bent
sufficiently to maintain alignment, but not tight enough
to bind spring action.
P300(32)
Torque by running nut to
P300(42)